1600 to the nearest hundred

What is the simplified expression for 6(2(y+x))

Agarden consists of an apple tree, a pear tree, cauliflowers, and heads of cabbage. there are 40 vegetables in the garden. 24 of them are cauliflowers. what is the ratio of the number of cauliflowers to the number of heads of cabbage?

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)